26140840 has 64 divisors (see below), whose sum is σ = 64825920. Its totient is φ = 9486400.

The previous prime is 26140837. The next prime is 26140847. The reversal of 26140840 is 4804162.

It is not an unprimeable number, because it can be changed into a prime (26140847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52995 + ... + 53485.

It is an arithmetic number, because the mean of its divisors is an integer number (1012905).

Almost surely, 2^26140840 is an apocalyptic number.

26140840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26140840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32412960).

26140840 is an abundant number, since it is smaller than the sum of its proper divisors (38685080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26140840 is a wasteful number, since it uses less digits than its factorization.

26140840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 26140840 is about 5112.8113597120. The cubic root of 26140840 is about 296.7835643066.

The spelling of 26140840 in words is "twenty-six million, one hundred forty thousand, eight hundred forty".